Steam-turbine-driven centrifugal pump.



j UNTTED sTATEs PATENT Orsi-oa.

Josnrnrmmman, or cantoni', GLASGOW, soo'rmmn, AssIGN'On To e. a J. were., LIMITED, OF oATHOaaT, GLASGOW, SCOTLAND.

SEVAM-TUBBINE-DBIVEN -CENTRIFUGAL PUMP.

lSpecification of Letters Patent.

Paptedsepan, 191,8.

fApplication led December 22, 1914. Serial No. 878,807.

To all 'whom 'it guay concern:

Be it known th t I, JOSEPH PETERMLLER, a subject of the Emperor of Germany, re-. siding at 40 Balmoral avenue, Cathcart, 6 Glasgow, Scotland, have invented certain new and useful Improvements Relating to Steam- Turbine-Driven Centrifugal Pumps; and I do hereby 4 declare the following to be a full,- clear, and exact descri tion o f the invention, 10 such as will enable others skilled in the art to which it appertains to make and ,use the same, reference being had to the` accompany in? drawings, and to letters or figures of re e rence marked thereon, which form a part" 16 of this specification.

My invention relates to centrifugal pumps driven directly by steam, turbines, the tur- 4bine' and ump rotors being mounted on a common s aft.A The object of'the invention 20 is to'allow of the construction of a unit of this nature which can be put intoV action quickly without previous heating up, and without seriousA rlsk of injury due to unequal expansion, 'and in which, moreover, 26 the axial clearances between the rotor and statorof the pump can be kept extremely small. M inventionwhich will be described in thel ollowing specification and more partic- 805 ularly defined in` the annexed. claim-1nvolves the employment of a pump of the sin le-stage2 single-admission balanced type, an a .turbine of the sin lepressure-stageimpulse type, the rotor of t e turbine, therefore, having very little 'tendenc to move@ [axially due tosteam pressurehe turbine and pump rotors are mounted on a common shaft but within separate stator casings.

The pump suction is. arrangedlat the side of i. the pump' remote from the turbine. Two

" bearings "are provided for the common shaft-the first between4 the turbine and the pump and `the second on the other' side of the turbine. Means are provided for ad- 46 justingthe first bearing in a direction "parallelto the axis of the shaft, and the shaft isprovided with a uide collar on each side of this bearing, `eac of the two collars be* ingadapted to engae--when necessarywith one or other si 'e of the bearing, 'in

be widened by the shaft travelingV axially.

'movable the shaft, an allow the shaft ve order to limit the axial movement of the shaft and prevent the rotor of the pump from coming linto contact with the stator.

In the accom anying drawing Figure 1 is a ongitudinal section through 5 a unit according to-my invention.

Fig. l shows the extreme end of the inlet pipe of the-centrifugal pump` Fig. 2 is a plan-drawn to an enlarged scale-of the middle bearing and illustrates the means for adjusting this bearing.

'a is the turbine casin and b 'the turbine rotor. o is the pump caslng and d4 the pump rotor. e is the common shaft for the two rotors, which shaft is supported' in abear- 66 ing f situated; between the turbine and the pump and a iearing g beyond the turbine. These bearin are supported in casings It k of which theI rasing h is formed 'integrally with, or ri'gi ly attached to, the adjacent 70 cover rn. of the pump casing or other struci turalpart of the pump `caslng. The pump rotor 1s formed with very fine axial clearance` at g, and an contact between rotor and stator at this lace should be prevented. It has also v`ery Ane-,radial clearance at aand p and it is of course desirable that, ifthe aoking rings should oncetouch lthe impe ler df and cut a groove in it, this groove should not The pum 'is arranged to be balanced when running, ut, when being put into action or on other occasions, there may be a'. tendency for end movement on the shaft andf'it is therefore necessary to providesguide' collars. These guide collars, according Vto iny'inverk tion, are laced on either side of the axially ringj and are re resented. by 1' and s. The are fixed on, an yrotate with,

.little end, 90 movement 4with, respect` to the arin f. This bearing canV have its longitudina` or axial position adjusted by means of the pin t which is carried eccentricallyby -the shaft u, means being provided for rotatin this ilf` shaft throughthe necessary angle. Te in t works in, a slipper o which 1s adap to, slide in a. transverse slot 'w' cutin the bearing. Othen means of adjusting the bearing .i may, however, be employedl The adjust1100 ability of the bearing f allows of the fine axial 4('Jlefnance or clearances at'the pump to be regulated as desired.

Various designs of pum rotor and easing may be employed, especially as regards the Water packing and balancing arrangements. I do not confine myself tothev precise details shown on the drawing, but in all eases I desire, in order to reduce to a minimum the leakage of Water and at the same time toprevent or limit injury due to Contact between y stator and rotor, to confine the axial move ,mentI of the lii'nits.

By placing the guide collars on 4the two .sides of the bearing f, I secure three advanf taggges.A (l) No parts subjected tosteam pressure-and consequently liable to great ranges of temperatureare inter osed between the guide collars and the'A ne elearances in the pump.: (2) The lengtliof sha-fibetween lthe guideeollars and the fine elearances on the pump is comparatively short.

(3) .The guicle collars engage With a bear-A -mgvhieh is. held in a' member rigidly and directly connected tothe pump easing, Byrmeansof.myinvention it ie'possible to Construct `a turbine pump unit, in which, in

pump rotor within very iine,

spite .of a high water pressure, it is ossible to prevent anything but a verysma l'leakage of water, and at the same time provide a. unit which can be started up quickly without previous heating and .Without risk of injury and, moreover, va unit which is simple, efficient, and compact.

Having thus described. my invention, what I claimas new and desire to secure by Letters Patent is In a` Isteam turbine driven centrifugal pump the combination of a stator, a rotor, a pump casing, a pump rotor, a common shaft on which said rotors are mounted, an axially movable shaft, a pair-of col ars on the shaft engaging with said journal bearing on opposite sides, and an eeeentrically*v mounted pin 'engagin with said journal bearing for shifting sai guide coll ars to limit the axial movement of said shaft, substantially as set forth.

In testimony whereof I have signed my name to this specilication in the presence of two subscribing Witnesses.

JOSEPH PETERMOLLER. lVitues'ses: JAMES DAYTON Imam, THOMAS ALEXANDER LOGAN. 

